Furcation Involvement

Question 1

Which furcation is best for regeneration?

Answer 1

Class II

Question 2

The ____________ represents the undivided region of the root.

Answer 2

Root trunk

Question 3

The _____________ is the root of the furcation.

Answer 3

Fornix

Question 4

What is the width of most molar furcation entrances?

Answer 4

Less than .75 mm (smaller than Gracey curette)

Question 5

T/F: Buccal furcations are wider than lingual ones on mandibular molars.

Answer 5

True

Question 6

What is the order from widest to narrowest of furcations in maxillary molars?

Answer 6

Mesial > distal > buccal

Question 7

T/F: Almost all mandibular roots have concavities.

Answer 7

True

Question 8

What is the least likely root to have a concavity?

Answer 8

Palatal

Question 9

A ___________ may favor the onset of periodontal lesions in the affected furcation.

Answer 9

Cervical enamel projection

Question 10

What is the differential diagnosis for a furcation involvement?

Answer 10

1. Plaque induced periodontitis
2. Pulpal pathosis
3. Trauma from occlusion

Question 11

What is the likely culprit for a furcation radiolucency with no deep prob depths?

Answer 11

Trauma from occlusion

Question 12

T/F: Osseous surgery is most effective in class II furcations.

Answer 12

True

Question 13

Which is the best root to resect in a maxillary molar?

Answer 13

Distal buccal root

Question 14

After root resection is done, how long do you have to do the RCT?

Answer 14

2 weeks

Question 15

T/F: Long root trunks are good for root resection.

Answer 15

False

Question 16

T/F: Fused roots are good for root resection.

Answer 16

False

Question 17

___________ is a very good option for class III furcations.

Answer 17

Hemisection

Question 18

What is tunneling?

Answer 18

Sometimes used in grade III furcation — remove all the bone under the furcation

More problems than solution — 25% failure in 5 years

Question 19

T/F: Mandibular and buccal maxillary class II furcations are more predictable with GTR than mesial and distal maxillary class II furcations.

Answer 19

True

Question 20

When you fill a crater with bone, what is the maximum fill you will end up with?

Answer 20

70%

Question 21

What are best treatment options for a class I furcation?

Answer 21

SRP

Question 22

What are the best treatment options for class II furcations?

Answer 22

MANY OPTIONS

SRP, open flap debridement, Osseous surgery, GTR, tunneling, root resection

Question 23

What are the best treatment options for class III furcations?

Answer 23

Tunnel, resection/hemisection, extraction